Corner plow



May 10, 1932. c. E. sTRoBuRG ET AL CORNER PLow Filed April 6, 1931 Patented May 10, 1932 rra!) STATES PATENT oFFcjE CLARK EMIL sfraoBURG AND GLEN cnam srrnonURG, or BLocx'roN, IOWA ,i

oonNEarLow Application led April 6, 1931. Serial No. 528,688.

This invention relates to an improvement in corner plows of the character described and claimed in Letters Patent of the United States, No. 1,787,800, granted to us on Janu-V ary 6th, 1931, and its primary purpose is to provide an improved method of mounting thekfurrow wheel of the plow in order to secure more effective operation of the corner plow attachment.

.10 A further object of the invention is to prov vide improved means for mounting the corner plow attachment on the plow frame and for operatively connecting it to a tractor by which the plow is to be drawn.

With these and other objects in view our invention consists in the construction, arrangement and combination of the various parts of our device, whereby theobjects contemplated are attained, as hereinafter more .20 fully set forth, pointed out in the claims, and illustrated in the accompanying drawings, in which Figure 1 is a plan vview of an improved corner plow embodying our invention and illustrating the furrow wheel in various positions which it may assume on a straightaway course and in making a turn.

Figure 2 is an enlarged sectional view illustrating a special form of furrow wheel which preferably is used with the vcorner plow, the wheel in this view beingshown in its normal position. Y i

Figure 3 is a similar view showing the furrow wheelvin itsposition assumed in making a turn.

Figure 4 is a perspective view of a hood for shielding the hub and axle of the slidably mounted furrow wheel.

The type of plow to which this invention lrelates is a gang plow especially designed for use with a tractor and having an attachment in the nature of an extra plow bottom for plowing the corner of a field in making a turn. This extra plow bottom, which is designated as a corner plow, is held in elevated position during such time as the tractor and plow are following a straightaway course and connected in such manner to the tractor that during the making of a turn it is lowered for operation to facilitate the plowing of corners over a pulley 56 carried in an elevated posiwhichV cannot ordinarily be accomplished by tractor drawn plows.

The frame of the gang plowincludes a plurality of plow beams 10, in this instance three V in number, and each carrying a plow bottom 12. rThe frame is supported by a casterwheel 14 and a land wheel 16, which is rotatably mounted on a dropaxle18. There is also anotherpdrop axle 20 for the furrow wheel, which is designated by the numeral 22.

The gang plow is adapted to be drawn by a tractor, a small portion of which is shown. The platform of the tractor for instance is designated bythe numeral 24, and the rear Wheels thereof by the reference numeral 25. A suitable hitchdevice is provided for attach-k ment to the follower machine such as the gang plow. The hitch device here shown includes a draw bar 26 pivoted to the tractor at 27 and having a pivotal connection at 30 70 to a cross member 32 attachedy to the plow frame. To one end portion of the cross member 32 is pivotally attached at 34 an inclined brace 36 which is bent laterally at its forward end and provided with" a plurality ofL bolt 7 holes 38. The laterally extending kportion of Y the brace 36 'extends across the draw bar' 26 machine are making a decided turn to the left.

The corner plow attachmentincludes a plow beam 44 carrying a bottom 46. A clevis 48 is pivotally connected to the forward end of the beam 44 and is provided .with astem 50 extending loosely through a horizontal opening in a laterally extending bracket 52 carried by a portion of the plow frame.

Fixed to the corner plowV bottom 46 .is a flexible connecting member such as a cable 54 which extends forwardly and laterally and .100

i tion as by a post 58 attached to the plow frame. Thercable r54 thence extends downwardly and forwardly on an inclined line, whereby it crosses from the right hand to the left hand side of the machine and is attached at its forward end as by a. clevis 60 to the lefti rear side of the platform 24 ofthe tractor.

The length of the flexible connecting member 54-between its two points of attachment, namely tothe bottom 46 and thettra-ctor 24,

- is such that it d'oesnot'permit*the pivote'd corner plow to be lowered to operative position during such time as the tractor and plow are traveling 1n a straight line; Its length is,

such, however, that when the tractor makes Vfa lturn'tothe left, as indicated in Figure 1, the corner plow 46 is lowered tofoperative position by :slacking of the cable 54, through' pivotal movement of the bar.

Thepivotal movementof the corner plow partsV ofthe draw Aattachment .ispermitted bythe flexible orYV swivel-connectionfof itsfbeam 44, through thev clevis 48,stem 550, and bracket 52. It is 0bvious .that when the plow 46 is 'in lowered. position it will operate to .plow the fcorner portions ofthe field whichfcamiot ordinarily be reachedby the plows of the gang,

-lt is obvious that when'the corner lha-sbeen completed the :plow 46 will ibe kraised to inl operative position 'byfa vstraightening out ofV Y the tractor hitch and gpl/'ow frame, which vthus exert a draft on the flexible member 54. l

During :operationof: the plow vthe Yfur-row 'wheel 22 travels in the llast furrow made `by' the plowin .a preceeding round ofthe field, vsuch -a furrow beine designate'd'in Figure l 'ien rounding acorner,

Vbythe numeral 62.

-however, the furrow wheel, if mounted inthe lordinary manner, woul'dride out off fthe fur- -row 62 .andY travel on the Vunplowed land as indicated by dotted line position 22ain Figure l; This is because its normal'position would not permit the vfurrow wheel `:to reach land 'travel in the furrow on the curvedpart. Y'll'ietravel.of t'lie furrow vwheel in rounding a corner, if it'were permittedtoride upv V'on theyunp'lewed land, would interfere with-A the proper action .of the fcorner plow attachment vbecause fitwou'ld tend to elevate the bottom 46 suiiciently'that it would not plow the xcorner.

To overcome :this d1friculty,we fh'ave devised an improved method of mounting the .furrow wheel to permit it to slide voutwardly at times to remain Iin the furrow while rounding a corner.

To accomplish this end the drop `axle 2O isV yformed with ian 'elongated' spindle designated by the numeral-64and`the furrow wheel 22 isr provided with a 'hub which is 'elongated in both directions from the plane of the wheel.

AThe inner end portion 66 of the hub lits snugly on the spindle 64 while the outer end portion of the hub 68 is of enlarged-'diameter inV substances. fner end with a U-shape'd sleeve .78:adapted order that it may receive a stop collar mounted on the end of the spindle.

During straight ahead travel the wheel 22 will usually remain close to the drop portion of the axle 2O as indicated in Figure 2, in 70 providing .a .stop `for the outward sliding i This permits the wheel 22 to 80 travel-at all .times intheffurrow 62'to .permit A.effective operation offthe corner plow-46'.

movement.

, yAhood 7 6, .substantially semi-cylindrical in form preferably is .provided .for covering the inner end portionlof the spindle 64 land 5 protecting-it from -and otherfforeign The :hood 76 isiformed 'atits inte embrace the vertical part of the top raXle 20 zuid be'clam'pedtheretoas:by ya ibolt 80T- The hood `76fis of sufficient length tolsli'ghtly overlap the inner fend portion of the "hub member 66 when the vwheel 22 is :atits outward limit of movement. An'a'djusta-ble stopV col'lar65 .is held` by `a set screw-6:7 on the spinlus die A6.4 to limit inward Hmovement, of the wheel 22. An annular rib69 on the 'hu-b member 66 prevents `-dirt from working along this hub member and onto the yspindle- 64 when the wheel 22` is in the position 'shown in Fig 100 urej3`.

It will be observed that the hub -member,68 isclosedfat yits outer end to further prevent the `entrance of dirt to the hub and spindle. In

order'to .permit access'to the pin 82 'Whicl 105 holds'thefstop collar -70 'in place, the hub member 68 is screwed 4onto the hub member 6.6.

l Tozassist in maintarnrng-the-corner plow in proper position we have pro-vided :a brace '86 attached at 88 to .the rear end portion of th -plow beam k44. Thebrace 86'extends laterally and forwardly and is bent between. its ends whereby its 'forward portion lextends in a plane substantially at right angles to the lower end of the post 58 to which it is p-iv' oted, as-by a ,bolt 90. The brace 86 projects Y vbeyond `its pivot 9.() and beneathithe adjacent plow beam 10, which acts .asa stop vto limit the downward pivotal movement of the mam portion of the brace and to prevent it froni passing below a substantially horizontal position when the corner Vplow inoves'to foperative position.

Our present invention is `a-n improvement overthe cornerplow disclosed by our patent above vreferred to in several particulars, such as the sliding arrangement of the furrow wheel, the method of attaching the corner plow beam 44 to the plow frame .by means .of

the clevis and bracket, and also themethodfv of directly connecting the cable 54 to the corner of the tractor. l

Some changes may be made in the construction and arrangement of the various parts of our device without departing from the real spirit and purpose of our invention, and it is our purpose to cover by `our claims, any modified forms of structure or use of mechanical equivalents, which may be reasonably included within their scope.

We claim as our invention 1. An improvement in corner plows of the type having a plow bottom held in elevated position during straightaway travel and adapted to be automatically lowered while rounding a corner, said improvement consisting of a slidably mounted furrow wheel for the plow frame, arranged in advance of the corner plow bottom, and capable of lateral sliding movement whereby it may remain in and follow a furrow throughout a turn of the plow.

2. In a plow of the character described, an axle having an elongated spindle, and a wheel having an elongated hub slidably and rotatwith a plow bottom thereon, a clevis pivoted on the forward endy of said beam, said clevis havinga stem extending loosely through said bracket for pivotally connecting the attachably mounted on said spindle for the pur- Y poses stated.

3. In a plow of the character described, an axle having an elongated spindle, a stop member at the outer end of said spindle, and a Y wheel having a hub elongated on both sides of the wheel, the inner end portion of the hub fitting snugly and slidably engaging said spindle and the outer end portion being enlarged in diameter to accommodate said stop member.

4. In a plow of the character described, an axle having an elongated spindle, a wheel having an elongated hub slidably and rotatably mounted on said spindle for the purposes stated, and a hood carried by said axle, overlying and partially embracing that portion of the spindle exposed by outward sliding movement of the wheel.

5. A corner plow attachment for -a gang plow drawn by a tractor, comprising a plow beam pivotally mounted at its forward end on the gang plow frame and carrying a corner plow, and a flexible member attached at one end to said plow beam and extending laterally and forwardly toward an outer rear corner of the tractor, means for attaching said flexible member directly to said outer rear corner of the tractor to prevent longif` wardly to operative position whilevthe tractor is turning a corner in one direction.

6. A gang plow having a frame, a bracket on and extending laterally of said frame, and a corner plow attachment including a beam 

